LT1239_02 datasheet(2/12 Pages) LINER

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LT1239

DESCRIPTION

ing circuitry. A low-battery detector with a 5V threshold

powers down the second regulator and the error amplifier

to limit the discharge voltage of the backup cells. This

prevents deep discharge damage to the lithium cells. Both

regulators have independent shutdown and current moni-

tor functions.

LT1239CS

ORDER PART

NUMBER

Consult factory for Industrial and Military grade parts.

TJMAX = 100°C, θJA = 120°C/ W

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Regulator 1 (Notes 7, 8)

Regulated Output Voltage (VADJ = VOUT1)VIN1 = 4.3V, IOUT = 1mA, TJ = 25°C

3.700

3.750

3.800

VIN1 = 4.8V to 24V, IOUT = 1mA to 30mA

3.650

3.750

3.825

Line Regulation

ILOAD = 1mA, VIN1 = 4.3V to 30V

210

Load Regulation

VIN1 = 5V, ILOAD = 1mA to 30mA, TJ = 25°C– 12

– 25

VIN1 = 5V, ILOAD = 1mA to 30mA

–20

– 50

VIN1 = 5V, ILOAD = 1mA to 50mA, TJ = 25°C– 20

VIN1 = 5V, ILOAD = 1mA to 50mA

– 30

Dropout Voltage (Note 9)

ILOAD = 1mA, TJ = 25°C

0.15

0.20

ILOAD = 30mA, TJ = 25°C

0.25

0.40

ILOAD = 50mA, TJ = 25°C

0.30

Ground Pin Current (Notes 10, 11)

ILOAD = 0mA, VIN1 = 3.75V

µA

ILOAD = 30mA, VIN1 = 3.75V

0.80

1.2

ILOAD = 50mA, VIN1 = 3.75V

1.35

Adjust Pin Bias Current (Note 12)

TJ = 25°C

120

ELECTRICAL CHARACTERISTICS

PACKAGE/ORDER INFORMATION

(Note 1)

Input 1 Voltage ......................................................

±30V

Input 2 Voltage ............................................. 30V, – 0.6V

Output 1 Voltage ........................................... 30V, – 0.6V

Output 2 Voltage ............................................. 6V, – 0.6V

Adjust Pin Current ................................................ 10mA

SHDN1, SHDN2 (Note 2)

Input Voltage .............................................. 6V, – 0.6V

Input Current ...................................................... 5mA

IMON1 Voltage

(Note 3) .......................... (VIN1 – 30V) < IMON1 < VIN1

IMON2 Voltage

(Note 4) .......................... (VIN2 – 30V) < IMON2 < VIN2

E/A Output Voltage (Note 5) .... – 0.6V < VE/A(OUT) < VIN2

E/A Input Voltage (Note 5) .......... – 0.6V < VE/A(IN) < VIN2

5V Input Voltage ............................................. 6V, – 0.6V

Operating Temperature Range ......................... 0 to 70

°C

Junction Temperature Range .............................(Note 6)

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

ABSOLUTE MAXIMUM RATINGS

TOP VIEW

S PACKAGE

16-LEAD PLASTIC SO

ADJ

GND

SHDN1

GND

SHDN2

E/A (IN)

E/A (OUT)

OUT 1

IMON1

INPUT 1

5VIN

OUT 2

IMON2

INPUT 2

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